package java9_3;

/**
 * @author oldliu
 * @since 1.0
 */
public class Ca {
    private int a;
    private int b;
    public int xxx(int i){
        return b=i;//? b=i;return b;
    }

    @Override
    public String toString() {
        return "a="+a+",b="+b;
    }

    public static void main(String[] args) {
        Ca c=new Ca();
        int r=c.xxx(100);
        System.out.println(r);// 100
        System.out.println(c); //a=0,b=100
    }
}
